Johnson, D. W., Johnson, R. T., & Holubec, E. J. (1994). The new circles of learning: Cooperation in the classroom and school. Association for Supervision and Curriculum Development.
Citação do estilo Chicago (17ª ed.)Johnson, David W., Roger T. Johnson, e Edythe Johnson Holubec. The New Circles of Learning: Cooperation in the Classroom and School. Alexandria, Va: Association for Supervision and Curriculum Development, 1994.
Citação MLA (9ª ed.)Johnson, David W., et al. The New Circles of Learning: Cooperation in the Classroom and School. Association for Supervision and Curriculum Development, 1994.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.